George m



(No Model.)

G. M. CHENEY) ARCH GULVERT.

No. 591,949. Patented Oct. 19,1897.

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GEORGE M. CHENEY, OF INDIANAPOLIS, IN DIANA.

ARCH CU LVERT.

SPECIFICATION forming part of Letters Patent No. 591,949, dated October19, 1897.

' Application filedNovember 28,1896- Serial No. 613,830. (No model.)

To all whom, it may concern:

Be it known that I, GEORGE M. CHENEY, a citizen of the UnitedStates,residing at Indianapolis, in the county of Marion and State ofIndiana, have invented a certain new and useful Arch Culvert; and I dohereby declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart to which it appertains to use the same, reference being made to theaccompanying drawings, forming a part thereof.

My invention consists of a steel-frame support solidly riveted togetherin such a manner as to admit of the building of a segmental arch ofbrick or stone, with a small rise, as compared with the length of span,and in the construction of an arch culvert of two courses of material.The inner course of material or intrados Z), Figure 1, is laid with anunyielding mortar, as cement or lime mortar. The

outer courseor extrados a, Fig. 1, is laid with a yielding mortar, ascoal-tar or asphalt. The construction of an arch with the outer courselaid with an elastic mortar is for the purpose of protecting thestructure from sudden heavy jars, and is for the purpose of permittingof the use of the structure as soon as completed without danger to thestructure.

Referring to the drawings, Fig. 1 shows a cross-section of said archculvert, with the feet of the arch resting on a steel channel, which issolidly riveted to the end trusses, and which rest upon the abutments ofthe arch, forming the upper surface of the skewback. The end trusses areso constructed as to admit of the free passage through the entireopening of the arch, and at the same time firmly hold the channelswhichform the upper part of the skewback in place, and also serve as aguard-rail at each end of the culvert.

Fig. 2: No. 1, as marked on the drawings in Fig. 2, shows the end posts.No. 2 shows the lattice framework between the end posts. No. 3 shows theshoe on which rest the posts. No. 4 shows the channel upon which restthe feet of the arch. No. 5' shows an intermediate stay brace. No. 6shows the arch-support posts.

Fig. 3 shows a large detail of the shoe on which rests the post.

Having fully described my invention, what I claim, and desire to secureby Letters Patent, is-

1. An arch culvert for highway purposes with a rivet steel-frame trussat each end of the arch, riveted to a steel plate or channel forming theupperpart of the abutment of the arch, and so constructed as to admit offree and unobstructed passage through the opening of the arch.

2. A riveted steel framework supporting an arch and the end trussesserving as a guardrail, and as a stay and support for the channels,forming the upper part of the skewback.

The construction of an arch culvert of two courses of material, theinner course or intrados, laid with an unyielding mortar, as cement orlim'e mortar; the outer course or 'extrados, laid with a yielding mortaras coaltar or asphalt.

4. In combination, a steel plate or channel, at each foot of the segmentof the arch and forming the upper part of the abutment or skewback ofthe abutment, riveted to and held in place by a vertical truss at eachend of the arch, the truss at each end extending above the roadway for aguard-rail and protection of the masonry at the ends of the arch.

GEORGE M. CHENEY.

W'itnesses:

CHAS. A. KRUTSOH, J 0s. LAYCOCK.

